Valve for carbon dioxide fire extinguishing apparatus



Feb. 21, 1933. c ROWLEY 1,893,899-

VALVE FQR CARBON DIOXIDE FIRE EXTINGUISHING APPARATUS Fi led June so, 1952 Ways 55 m MM '25 Fig. 2 is a vertical sectional view througi Patented Feb. 21, 1933 UNETE' are ARTHUR c. RowL'EY, or DRE-XEL HILL, PENNS'JYLVANIAQASSIGNOR TO GLOBE Am:

MATIC SPRINKLER COMPANY, or rnrnsnnnr r afl rnmrsrnvnnrm A CORPQRA- TION OF PENNSYLVANIA VALVE FOR CARBON nroxrnn rmnnxmneursfime ARPARATUS Application filed June 30,

This invention relates to improvements in carbon dioxide firextinguishing systems, and more particularly to improvements in' valves: of a character adapted for use vvitl containers for the carbon dioxide.

One object of my invention is to provide" a valve adapted for the specified use which shall be relatively simple in form and of relatively low manufacturing cost and which 10. shall be highly efficient in operation. 1

Another object of the invention is to provide a safety means incorporated in the device in a novel and improved manner.

Still another object of the invention is tov '15 provide a novel form of valve seat insuring tural features hereinafter set forth and illustrated in the attached drawings, in which: Figure 1 is a side elevational view of a valve made in accordance with my invention, and

the valve and a portion of a container to which the valve is attached.

With reference to the drawing, the valve comprises a casing 1 having at is lower end a threaded extension 2 through the medium of which and as shown in Fig. 2 the valve casing is secured in the container 3 which. holds the carbon dioxide fire-extinguishing medium. At one side the casing has an in- 5 ternally threaded hollow boss 4 providing both a charging and discharge port communicating with the interior hambcr 5 of the casing. Threaded into the inner end of the boss 4: is a sleeve 6 which provides a restriction for the aforesaid port.

Threaded into the upper end of the casing 1 is a valve stem 7. this stein projecting beyond the upper end of the casing and having attached thereto a hand wheel 8 by .45 means of which the stem may be turned and 1932." Serial No. 620,217.

thereby advanced orretracted in the Suitable packing means 9 is provided inthe upper end of thecasing and the valvestem sealing the jointwbetween the said stem and the casing, The "stem" has threaded into the inner end thereofa-plunger 11, this plunger having .a longitudinal passage12 whichicommunicates with a trans; verse passage 13 in the lower end of thestem 7 which transverse assage c ommun icates with the chamber 5.] Confined: between the stem '7 and. the plunger ,11 and extending across and closing thefpassage12 isafram gible disk 14,; gasket ,15 preferably being provided tof insure a:thorough'seal at ,the clamped" edges of the disk. The disk- 14 which preferably is of phosphor-bronze or other metal inert to carbon dioxide isi adapt ed to rupture under a predetermined excessive pressure within thev'container 35 As illustrated in Fig. 2," the casing 1-com prises upper and lower sections ltiand 17 respectively, the {upper section being thread ed into the lowersection and confining withnnihe latter a valveseatelement 18 of flexir hle rubber, this .elementhaving a tapered portion 19 projecting inwardly beyond the abutting lower edge surface of the upper section 16 of the valve casing. The inwardly projecting portion 19' of the element 18 constitutes a seat for the lower end of the plunger 11, as shown in Fig. 2, and the lower end of the plunger 11 is undercut on its outer surface to provide a shoulder 21 which by engaging a reverse shoulder at the bot- 8 tom of the upper casing section 16 limits the downward movement of the plunger 11 and the stem 7, while at the same time insuring a firm contact between the lower end of the plunger and the valve seat element 18. In charging the container 3 the stem 7 is backed away through the medium of the hand wheel 8 to elevate the piunger 11 from the element- 18 upon which it normally seats, and a charging connection 22 is threaded into the outer end of the boss l. Through this connection the CO is admitted under pressure to the container 3, and when the latter has been rully charged, the stem 7 is again turned down to bring the plunger 11 into engagement with the seat element 18, the pressure of the CO within the container acting upon the flexible rubber seat element to create an etiective seal between, this element and-the plunger preventing escape of the CO therebetween T he charging connection 2-2 is then removed. Release of the CO and discharge thereof throuahtlie hollow boss 4 as a discharge port may now be effected when required by elevating the plunger 11 from its seat by manipulation of the hand wheel-8.- In the event that abnormal pressures are developed ent ports communicating with a common chamber, said casin comprising separable sections, a flexible riibber valve seat element confined between said sections and embracing one of said ports, a valve element adjustably mounted in said chamber and cooperative with said seat element to close the associated port, and'means for limiting the movement of said valve element in the direction ofisaid seat to thereby prevent undue fiGXllIB Of said flexible seat element -under pressure of said valve element.

within the container 3 while the valve is in 1' the ClOSlDQ' position illustrated in rig. 2, this pressure when reaching a predetermined magnitude will rupture the disk 14;,per- Initting discharge of the contents of the container through the passages 12 and 13, and from the chamber 5 through the ooss 4:.

A material simplification is effected through the use of the 'flexible'valve element 18, which as described operates through the medium of the internal pressure in the easing to insure a thorough sealing of the container, and bv incorporation of the. relief device in the form of the frangible disk l t in the movable valve element.

It will be a parent, however, that there may be modifications in the detail structure of the device without departure from 'the invention.

I claim:

1. In a valve of the stated character, the combination with a casing having a chamber, and inde endent ports communicating w; said chamber, a flexible rubber valve seat element secured in one of said ports, an adjustable valve element in the casing adapted to engage said flexible seat element to seal the associated port, a-passage in said valve element constituting a ovpass between said ports, and a pressure-release device normally closin said bvnass.

2. In a valve of the stated character, the combination with a casing having a chamber, independent ports communicating with said chamber, an annular valve seat element secured in one of said ports, said element being flexible, a valve element adjustable in the casin and adauted to engage said seat element to close the associated port, interengaging means upon said valve element and the casing for limiting the movement of the element in the direction of the seat, a passage in said valve element constituting a bypass between the ports, and pressurerelief means normally closing said bypass.

3. In a valve of the stated character, the combination with a casing having independ- 

